1. Hart, C.A.—Surveying from Air Photographs fixed by Remote Radar Control:Proceedings of the Royal Society Empire Scientific Conference, Vol. 1, 1948.
2. Hart, C.A.—Modern Mapping, including the Employment of Radio Technique:Proceedings of the Royal Society Empire Scientific Conference, Vol. 1, 1948.
3. Jelstrup, Hans S.—Note préliminaire concernant Mesures de longueur par ondes stationnaires electro-magnétiques,Oslo, 1927.
4. Smith, R. A.—Radar for Civil Aviation;Nature, Vol. 157, No. 3980, p. 151, 9.2.46.
5. Jones, F. E.—Measurement of Velocity of Propagation of Centimetre Radio Waves as a Function of Height above the Earth, Part I:Journal of the institution of Electrical Engineers, Vol. 94, Pt. III, No. 32, p. 398, Nov. 1947.